yuvframescapturer.h revision 5f93d0a140515e3b8cdd1b9a4c6f5871144e5dee 
1/*
2 * libjingle
3 * Copyright 2010 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef TALK_MEDIA_DEVICES_YUVFRAMESCAPTURER_H_
29#define TALK_MEDIA_DEVICES_YUVFRAMESCAPTURER_H_
30
31#include <string>
32#include <vector>
33
34#include "talk/media/base/videocapturer.h"
35#include "talk/media/base/yuvframegenerator.h"
36#include "webrtc/base/stream.h"
37#include "webrtc/base/stringutils.h"
38
39
40namespace rtc {
41class FileStream;
42}
43
44namespace cricket {
45
46
47// Simulated video capturer that periodically reads frames from a file.
48class YuvFramesCapturer : public VideoCapturer {
49 public:
50  YuvFramesCapturer();
51  YuvFramesCapturer(int width, int height);
52  virtual ~YuvFramesCapturer();
53
54  static const char* kYuvFrameDeviceName;
55  static Device CreateYuvFramesCapturerDevice() {
56    std::stringstream id;
57    id << kYuvFrameDeviceName;
58    return Device(id.str(), id.str());
59  }
60  static bool IsYuvFramesCapturerDevice(const Device& device) {
61    return rtc::starts_with(device.id.c_str(), kYuvFrameDeviceName);
62  }
63
64  void Init();
65  // Override virtual methods of parent class VideoCapturer.
66  virtual CaptureState Start(const VideoFormat& capture_format);
67  virtual void Stop();
68  virtual bool IsRunning();
69  virtual bool IsScreencast() const { return false; }
70
71 protected:
72  // Override virtual methods of parent class VideoCapturer.
73  virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs);
74
75  // Read a frame and determine how long to wait for the next frame.
76  void ReadFrame(bool first_frame);
77
78 private:
79  class YuvFramesThread;  // Forward declaration, defined in .cc.
80
81  YuvFrameGenerator* frame_generator_;
82  CapturedFrame captured_frame_;
83  YuvFramesThread* frames_generator_thread;
84  int width_;
85  int height_;
86  uint32 frame_data_size_;
87  uint32 frame_index_;
88
89  int64 barcode_reference_timestamp_millis_;
90  int32 barcode_interval_;
91  int32 GetBarcodeValue();
92
93  DISALLOW_COPY_AND_ASSIGN(YuvFramesCapturer);
94};
95
96}  // namespace cricket
97
98#endif  // TALK_MEDIA_DEVICES_YUVFRAMESCAPTURER_H_
99